化简(3+1)(3
2+1)(3
4+1)(3
8+1)得( )
A. (3
8+1)
2B. (3
8-1)
2C. 3
16-1
D.
(316−1)
人气:195 ℃ 时间:2020-03-29 06:59:12
解答
(3+1)(3
2+1)(3
4+1)(3
8+1)
=
(3-1)(3+1)(3
2+1)(3
4+1)(3
8+1)
=
(3
2-1)(3
2+1)(3
4+1)(3
8+1)
=
(3
4-1)(3
4+1)(3
8+1)
=
(3
8-1)(3
8+1)
=
(316−1).
故选D.
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